package com.kafka.config;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.annotation.EnableKafka;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.core.ConsumerFactory;
import org.springframework.kafka.core.DefaultKafkaConsumerFactory;

import java.util.HashMap;
import java.util.Map;

@EnableKafka
@Configuration
public class KafkaConsumerConfig {

    private static final String bootstrapAddress="localhost:9092";
    private static final String groupId="foo";

 
    @Bean
    public ConsumerFactory<String, String> consumerFactory() {
        Map<String, Object> props = new HashMap<>();
        props.put(
          ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,
          bootstrapAddress);
        props.put(
          ConsumerConfig.GROUP_ID_CONFIG, 
          groupId);
        props.put(
          ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, 
          StringDeserializer.class);
        props.put(
          ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, 
          StringDeserializer.class);
        return new DefaultKafkaConsumerFactory<>(props);
    }
 
    @Bean
    public ConcurrentKafkaListenerContainerFactory<String, String>
      kafkaListenerContainerFactory() {
    
        ConcurrentKafkaListenerContainerFactory<String, String> factory
          = new ConcurrentKafkaListenerContainerFactory<>();
        factory.setConsumerFactory(consumerFactory());
        return factory;
    }

    @Bean
    public ConcurrentKafkaListenerContainerFactory<String, String>
    filterKafkaListenerContainerFactory() {

        ConcurrentKafkaListenerContainerFactory<String, String> factory
                = new ConcurrentKafkaListenerContainerFactory<>();
        factory.setConsumerFactory(consumerFactory());
        factory.setRecordFilterStrategy(
                record -> record.value().contains("ss"));
        return factory;
    }

}